pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-12427-LetTheHacklesRise0.ps) >>/Users/jc/w/tmp/Tune-12427-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/LetTheHacklesRise0.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-12427-BlackDance.abc 2056 ABC music file with the extracted tune(s)
Tune-12427-BlackDance.pdf 39732 Portable Data Format
Tune-12427-BlackDance.ps 44956 PostScript
Tune-12427-BlackDance.txt 2056 Plain-text file with the extracted tune(s)
Tune-12427-LetTheHacklesRise0.abc 628 ABC music file with the extracted tune(s)
Tune-12427-LetTheHacklesRise0.ps 34482 PostScript
Tune-12427-LetTheHacklesRise0.txt 628 Plain-text file with the extracted tune(s)
Tune-12427-get.log 10646 Log file, useful mostly for debugging
These files should be available for 24 hours.